Help me please

Your fund invests evenly in 10 stocks. You want to sell one stock with a beta of 1.0 and use the money to buy another stock with a beta of 1.5. If the original portfolio has a beta of 1.15, what will be the beta for your new portfolio? 1) 1.35 2) 1.20 3) 1.15 4) 0.95 The after-tax cost of debt is lower than the before-tax cost of debt. The reason is that: 1) Companies can deduct interest payments from taxable incomes. 2) Bondholders can deduct interest payments from taxable incomes. 3) Bondholders can claim tax credit of interest payments. 4) None of the above. Helms Aircraft has a capital structure that consists of 40% debt, 10% preferred stock, and 50% common stock. The before-tax costs of capital for the three components are 10%, 11%, and 15% respectively. If the company's tax rate is 35 percent, what is the company's weighted average cost of capital (WACC)? 1) 8.33% 2) 11.20% 3) 12.60% 4) 13.98% If the inflation rate in the United States is greater than the inflation rate in Sweden, other things held constant, the Swedish currency will 1) Appreciate against the U. S. dollar. 2) Depreciate against the U. S. dollar. 3) Remain unchanged against the U. S. dollar. 4) Appreciate against other major currencies